.nav {
    overflow: hidden;           
    height: 47px;
    border-bottom: 2px solid #b1191a;
}
.nav_box {
    height: 47px;
}
.nav_lf {
    float: left;
    height: 47px;
    line-height: 47px;
}
.nav_lf ul li {
    float: left;
}
.nav_lf ul li a {
    display: block;
    font-size: 16px;
    font-weight: 700;
    color: #000;
    padding: 0 30px;
}
.nav_rg {
    float: left;
    height: 47px;
    line-height: 47px;
}
.nav_rg ul li{
    float: left;
}
.nav_rg ul li a {
    font-size: 14px;
    padding: 0 20px;
}
.nav_rg ul li:last-child a::after {
    content: '\e901';
    font-family: 'icomoon';
    margin-left: 5px;
}
.sk_bd ul li {
    overflow: hidden;
    float: left;
    width: 290px;
    height: 460px;
    margin-right: 13px;
    border: 1px solid  transparent;
}
.sk_bd ul li:nth-child(4n) {
    margin-right: 0;
}
.sk_bd ul li:hover {
    border: 1px solid #c81523;
}
    